In 2005, after 19 years off the air, Doctor Who made its triumphant return to TV screens with Russell T. Davies at the helm. After four seasons and three specials, Davies exited the series, with Steven Moffat and Chris Chibnall taking the reins and keeping the adventures of The Doctor and their companions continuing for a further nine seasons. And now, another 19 years after Davies rebooted the series, he is back as showrunner and ready to launch Doctor Who for a new generation.